Annual herbs, 30-60(-80) cm. Stems straight, thick, terete, glabrescent, branched. Leaves pinnately 3-foliolate; stipules subulate-lanceolate; petioles 1-4 cm; leaflets ovate to broadly elliptic, 15-35 × 4-15 mm, sparsely pubescent on midrib abaxially, glabrous adaxially, lateral veins 8-10 pairs, base cuneate or rounded, margin serrate, apex obtuse or acute. Racemes capitate or ovoid, 10-25-flowered; peduncles axillary, ca. 6 cm, straight, glabrous; bracts bristlelike, ca. 1.5 mm; pedicel ca. 1 mm. Calyx ca. 3 mm, membranous, veins 5. Corolla blue, 5-6 mm; standard longest petal, keel shortest. Ovary ovate, glabrous; ovules 5-7. Legume ovoid, 2.5-5 × ca. 2.5 mm, apex tapering and beaked, longer than body. Seeds 1 or 2, brown, broadly ovoid, ca. 2 mm, tuberculate. Fl. Jun-Aug, fr. Jul-Sep.
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A herb. It is a short clover like plant. It is slightly hairy. It grows 30-60 cm tall. The leaves have 3 leaflets. These are oval or oblong and have a notch at the tip. The flowers are blue or occasionally white. They are 5-6 mm long. They are in round heads on long stalks. The pods are rounded and 4-5 mm long. They are inflated and have a short beak.
Naturalized on waste and arable land. Cultivated and sometimes occurring in weed-infested places, at roadsides, etc.
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It grows in temperate and Mediterranean places. It grows in waste places. It is cultivated in north China.
Can be grown by seedlings. Seeds needs soaking.
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